has anyone tried spawning power + minions on necro?
Yes. I'm playing around with an MM and a spawning +5 staff. Animate Shambling Horror and Animate Bone Horror. The healthy minions also get Ancestors Rage and Splinter Weapon from another hero. Blood Bond and Dwayna's Sorrow in the team build makes for beefy minions that survive long enough to keep up a near permanent meat shield that does some respectable damage. I'm still experimenting.
I also added a +5 Ranger Expertise mod to my spirit spammer staff which improves energy management with spirits and eliminates the need for Spirit Siphon, opening up a slot for other options.
Also the +5 Soul Reaping mod makes Monk healers much more relevant than in the past. You don't need Power Drain or Leech Signet which opens up slots for a lot of options.
Even with all the new mods I'm still finding Blood is Power needs to be somewhere. I've been messing around with a BIP Monk at 8 Blood Magic, which is only one pip less than the old meta Necro. You can experiment with the rest of the bar either prot or healing. There's a ton of options.
There's a lot of testing to do and the possibilities are nearly endless. This is what I like most about this game. It's mind expanding.